As I mention in my book, N acetyl cysteine (NAC) is not found in food sources, but in the body, it converts into cysteine. NAC acts as a precursor to glutathione, a powerful Wait until you see what N acetyl cysteine (NAC) can do! Free radical protection* Maintains cellular health* A sulfur containing amino acid* Promotes production of glutathione* *These statements have not Exploring the Evidence of N Acetyl Cysteine (NAC) for Mood Disorders Psychopharmacology Institute NAC Timing Secrets: What is the best time to take NAC? Healthy Origins NAC (N Acetyl Cysteine) Healthy Origins NAC N Acetyl L Cysteine 120 Tabs